Laver Cup - Day 1

Team World Jack Sock of the United States, Team World John Isner of the United States and Team World Frances Tiafoe of the United States react during the Men's Singles match on day one of the 2018 Laver Cup at the United Center on September 21, 2018 in Chicago, Illinois.
(Sept. 20, 2018 - Source: Stacy Revere/Getty Images North America)